Apparatus for forming tying strips and applying the same to bags



Oct. 24, 1939. h A. POTDEVIN 2,177,118

APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME T0 BAGS Original Filed May 3, 1937 2 Sheets-Sheet 1 INVENTOR ATTORNEYS Oct. 24, 1939. A- P TD WN 2,177,118

APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME TO BAGS Original Filed May 5, 1937 2 Sheets-Sheet 2 ATTORNEY Patented Oct. 24, 1939 APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME TO BAGS Adolph Potdevin, Garden City, N. Y., assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation of New York Original application May 3, 1937, Serial No. 140,436. Divided and this application March 9, 1938, Serial No. 194,814

1 Claim. (Cl. 271-45) This invention relates to improvements in machines for making bags and is particularly directed to an improved device for applying a metal tie strip to the end of bags of the type known table or bed I6 is provided with an opening in the bottom thereof, the bags being disposed on this table or bed so that one flap of the bag bottom of the lowermost bag of the stack will sag I :5 commercially as metal tie bags. downwardly through this opening. 5

This application is a division of my copending Beneath the magazine table or bed I6 are a application Serial No. 140,436, filed May 3, 1937, pair of forwarding jaws designated 22 and 24 and is directed more specifically to a device of for gripping the flap of the lowermost bag and the character indicated having novel feeding forwarding the bag to forwarding rollers, as will -11 means for the blanks in the making of such bags be described presently. The operation of these as above referred to. jaws 22 and 24 and the various cams controlling In making metal tie bags a small strip of metal the same are described in full detail in my coextending transversely of the bag is applied to pending application Serial No. 140,436.

v the open end of the bag and when the bag is to This mechanism, however, is so arranged that 1 be closed the strip and bag end are rolled over at the proper time the jaws 22 and 24 will close upon the bag several times and the projecting upon the sagging flap at the bottom end of the ends of the tie strip are bent over the bag body lowermost bag in the stack of bags and then pivot to hold the bag closed. in a forward direction away from the magazine It is an object of the present invention to proto drag the end of the bag out of the stack and videa machine which is full automatic in its opermove it forward sufficiently for the same to be 20 ation and is adapted to form the tie strips and engaged between a pair of forwarding rollers 50 to apply the same to the bag in continuous operawhich are mounted to rotate about axes extendtion. However, the present application is more ing lengthwise of the machine, the jaws 22 and specifically directed to the novel means for with- 24 upon delivering each bag to these rollers open "25 drawing bags from the bottom of a stack of bags ing and then returning to their original position 25 and means for moving the bags laterally toward to receive the next bag. the discharge end of the machine. The forwarding rollers 50 deposit each bag In the accompanying drawings I have illuscrosswise of the machine upon a table or bed 52 trated the machine of the present invention. provided with slots 54 extending lengthwise of s In the drawings: the machine. This table 52 is provided with a 30 Fig. 1 is a plan View of the machine; and side plate 56 and an end plate 58 for promoting Fig. 2 is a sectional elevational view taken subproper positioning of the bags on the table. These stantially on line 22 of Fig. 1. plates are adjustable so as to accommodate the Referring to the drawings in detail: Bags 2 are machine to bags of different lengths as well as to taken from a magazine formed by adjustable upbags of different widths. 35 rights 4 located at the charging end of the ma- As each bag is deposited upon the table or bed chine, and are passed through the machine con- 52 it is engaged by a pusher 60 which is reciprotinuously while traveling laterally. During the cated lengthwise of the machine by mechanism advance of the bags 2. metal strip 6 enclosed in shown in my copending aplication Serial No.

940 paper tape 8 and constituting the tie strip is 140,436. This pusher engages the side of each appliedto the projecting flap I0 which is provided bag as the same is deposited on the plate 52 to for this purpose at the open end of each bag. move the bag laterally lengthwise of the machine The metal tape 6 and the paper tape 8 are to forwarding rollers 66. The rollers 66 deliver taken from separate supply spools (not shown), the bags between upper and lower forwarding e thepaper tape being folded about the metal strip chains or bands designated 68 and I0, respectively. 45 as the two progress through the machine. A motor 94 is provided for driving the machine.

The supply bags 2 are stacked at the maga- This motor, through a sprocket and chain drive, zine 4 on a table or bed IS. The bags in the stack drives a pinion 96 meshing with a spur gear 98 lie transversely of the machine and are fed formounted on a stub shaft which carries a gear I00.

ward lengthwise successively from the bottom of The gear I00 meshes with gear I02 mounted on 50 the stack with the bag bottom in the lead, into shaft I64 carrying pinion I06, the latter meshing position to be picked up by the forwarding mechwith a pinion I08 in mesh with a pinion III] on anism which forwards the bags laterally toward shaft H2. The latter extends longitudinally of the discharge end of the machine. the machine toward the charging end thereof It will be seen from Fig. 1 that the magazine Where the shaft terminates. This end of the I8I and I82.

FigP 2, is'so shaped that as the papertape passes the same one edge of the tape will be turned. in-

wardly over and upon the metal tape 6 to bring "the adhesive stripe I9! into engagement with the face of the metal tape.

and metal'tape continuetheir forward movement a stripe of adhesive I98 is applied to the turnedover part of the tape, as shown in Fig. 2.

shaft carries a gear I I3 meshing with wide faced gear IN, the gear IM meshing with a gear II6 on shaft 34. The opposite end of this cam shaft 34 carries a gear H8 meshing with gear I26 in mesh with gear I22 on the shaft carrying the lower roller of the two forwarding rollers 50, this shaft carrying a gear in mesh with a gear on the shaft of the upper rollers of the forwarding rollers 56, to provide a drive therefor.

The drive for the forwarding chains 68 and I6 is from a pinion I38 on the stub shaft I64, gears I46, I42, I64, bevel gears I46 and I48 which drives shaft I56 carrying the 'sprocke'tfor the lower chain 10. This shaft I56 carries a gear I52 meshing with gear I54 on the shaft I66 carrying the upper chain 68. This gear train'will drive the lower lead of the chain-68 and the upper lead of the chain 16 in the same direction toward the delivery end of the machine.

Referring to Fig. 2, it will be seen that the up'perlead of the lower chain "I6 rides along de- "pressedtracks I66 in the machine bed I58 while the lower leadof the'chain 68 rides beneath a s'pring p'ressed plate I62 urged downwardly toward the chain 16 by springs I64. This provides for-gripping the bagsso as in effect to attach the bags-successively to the forwarding chains for advancement.

-machine be'd-andthen forward toward the discharge end of the machine'by' a pairof feed rolls I66. The metal tape'as :it is drawn upwardly 'pa's'ses'about guide rolls as shown and'described in my parent 'application'Serial No. 146,436 and "the" paper tape 8 which is taken from a supply reel whi'chis to enclose the metal tape 6 before the latteris placed in position on the bags" 2' is also forwarded by the feed :rolls I66.

The paper tape passes from a' supply reel about guiding and tensioning rollers and between roller 162 and a gluing rollerwhere three stripes of adhesive 1 are continuously applied to the face 0f the tape, as described in my parent application Serial No. 140,436.

-Thepap'er 'n'ext passes about the rollers I86, Theroller I82, as will be seen from As the paper tape --The paper tape then passes over the roller I66,

*andthemetal 'tape'and the paper tape from 'thence' travel lengthwise of the machine beneath the projecting flap 16 of the bags 2, the adhesive "stripe I 68' contacting the underside of the flap.

the paper and metal tapes, together-with the bags, travel lengthwise of the machine they stripes upon the upper face of the flap I6 of the bags. The tapes and bags then pass beneath a hinged plate 268, to the rollers I66 which press the tapes and bags together.

The tie strip is continuous, as will be understood, and after it has passed the rollers I66 it is cut off between adjacent bags 2 by a striker bar 2M. After the tie strip has been severed the chains 68 and 16 continue the lateral advance of 224 which in turn meshes with pinion226 on the shaft of the "lower pair of forwarding rollers 66, this'igearmeshing with gear 236.0n the shaft of the upper pair of'forwarding'rollers 66.

It will be seen from all of the foregoing that the'present invention provides an automatic machine so constructed and arranged that bags are continuously taken from asupply stack and forwarded laterally through the-machine. At the same timepaper tape and metaltape are continuously fed lengthwise through themachine in superimposed relation to each other, adhesive beingapplied to the paper before the same contacts the metal strip and the paper being wrapped about'the metal, these two tapes finally being brought-into superimposed relation with respect to the ilaterallytraveling bags, whereupon the paper tape is folded over and attached to the bags. Prior to thedischarge of the bags from the -machine' the tapes; which constitute the tying strip; are severed between adjacentbags so that in thefinished bag we find a tying strip made up ofpaperiandmetal attached to the projecting flap on the open end. of the bag with the ends of the tying strip projecting a short distance beyond the sides of the bag.

eachfof saidxchains riding along said tracks, a

pair'of forwarding chains above the first-meniti'oned chains, and a spring-actuated plate over- 'lying'the lower flight of each of said upper chains ."and extending continuously substantially the length'of the chain .to force the same into pinching or clamping position with respect to the adjacent flight of the lower chain in said depressed track,"thereby to grip an article to be forwarded.

'ADOLPI-I POTDEVIN. 

